SI5348B-D08040-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5348B-D08040-GM is a network synchronizer and jitter attenuator from the Si5348 family, manufactured by Skyworks Solutions Inc. It integrates three independent DSPLLs within a single monolithic IC to support flexible SyncE, IEEE 1588, and SETS architectures. The device features ultra-low jitter of 100 fs typ (12 kHz to 20 MHz) and supports input frequency ranges up to 750 MHz for differential clocks and 250 MHz for LVCMOS. Output frequencies range from 1 PPS to 350 MHz for differential outputs and 250 MHz for LVCMOS. It operates on core voltages of 1.8 V ±5% and 3.3 V ±5%, with independent output supplies configurable for 3.3 V, 2.5 V, or 1.8 V. The component is housed in a 64-lead 9x9 QFN package and functions within an ambient temperature range of –40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Three independent DSPLLs supporting flexible SyncE/IEEE 1588 and SETS architectures
• Digitally controlled oscillator (DCO) mode providing precise timing adjustment for 1588 clock steering applications
• Programmable jitter attenuation bandwidth per DSPLL ranging from 0.001 Hz to 4 kHz
• Highly configurable output drivers including LVDS, LVPECL, LVCMOS, HCSL, and CML

Clock Generators, PLLs, Frequency Synthesizers Applications

• Synchronous Ethernet (SyncE) ITU-T G.8262 EEC Option 1 & 2
• Telecom Boundary Clock (T-BC) as defined by ITU-T G.8273.2
• IEEE 1588 (PTP) slave clock synchronization
• Stratum 3/3E, G.812, G.813 network synchronization

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure compatibility with required configuration parameters. Confirm that the factory pre-programmed sequence ID matches the intended application design. Check for any recent product change notifications regarding availability or compliance status before finalizing procurement plans.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when designing systems requiring strict adherence to telecom synchronization standards such as SyncE and IEEE 1588. Ensure the external reference clock meets the stability requirements for free-run and holdover modes. Verify that the serial interface configuration aligns with the system's control architecture and that the power supply rails match the specified voltage tolerances.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The SI5348B-D08040-GM belongs to the Si5348 series of network synchronizers. This series is designed for wireless backhaul, IP radio, small and macro cell communications, and data center switches. The 'B' grade indicates a maximum output frequency range of 350 MHz, distinguishing it from the 'A' grade which supports up to 718.5 MHz.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.